java value object

Question

I'm new to Java and I have to create a value object, (maybe it's called mapped object in Java) but my code doesn't seem to work, here is the value object:

package ....;

public class User {
    private int id;    
    private int uid;    
    private String name;

    public User()
    {
        // do something here
    }
}

and I assign a new value object like this:

public boolean some_function() 
{               
    User u = new User();

    return true; // got a breakpoint here
}

So if I comment out "User u = new User();" I will go to the breakpoint but if I keep it like above it will just stop running.

On a side note, I keep both the files in the same folder so eclipse doesn't import the file, is this correct or should I import it?

EDIT:

After some time I found out that I had to import the file manually, I thought I tried that but apparently I didn't.

You are not providing enough details to say anything. What do you mean mean by stop running? Can you see any error? What are you doing in the User() constructor? Please clarify. — Pascal Thivent
– Pascal Thivent, Commented Nov 23, 2009 at 15:31

delfuego · Accepted Answer · 2009-11-23 15:42:06Z

Dennis, if the code as you posted it is the exact code you're running, then this makes no sense -- the "User u = new User();" call would return you a new User object without any issues, since your constructor is empty.

To demonstrate that to yourself, change your constructor to:

public User() {
  System.out.println("I'm inside the User constructor!");
}

and call your some_function() function again. You should see that line printed out to your console.

Given what you're reporting and the code you're showing, I suspect that the class that contains some_function() isn't "seeing" the User class -- you're importing some other User class rather than the one you created. Are the two classes -- the User class and the class which contains some_function() -- in the same package? If not, what import statement at the top of the some_function()-containing class is handling the import of your User class?

lorenzog · Accepted Answer · 2009-11-23 15:31:24Z

0

Sure you don't have an infinite loop in your User() constructor?

answered Nov 23, 2009 at 15:31

lorenzog

3,6275 gold badges33 silver badges52 bronze badges

Comments

djna · Accepted Answer · 2009-11-23 15:41:34Z

0

Put some code into the constructor, for example

id = 99;

set a break point there.

I don't understand what you mean about importing into Eclipse - I have all my code in Eclipse - however I suspect that your application is not correctly seeing the User class. Maybe you are even getting a compilation error. Create your packages and classes in Eclipse, let it sort out the directories for you.

Show us the whole app class , including the import of User.

answered Nov 23, 2009 at 15:41

djna

56.2k14 gold badges80 silver badges125 bronze badges

Comments

Hank Gay · Accepted Answer · 2009-11-23 15:41:46Z

0

Put the breakpoint on User u = new User(); and step into the constructor to see what it's doing.

answered Nov 23, 2009 at 15:41

Hank Gay

72.4k36 gold badges164 silver badges224 bronze badges

Collectives™ on Stack Overflow

java value object

4 Answers 4

Comments

Comments

Comments

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

4 Answers 4

Comments

Comments

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related